Documentation for the State Variables Package for the Groundwater-Management Process of MODFLOW-2005 (GWM-2005)
Techniques and Methods
6-A36
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Abstract
Many groundwater-management problems are concerned with the control of one or more variables that reflect the state of a groundwater-flow system or a coupled groundwater/surface-water system. These system state variables include the distribution of heads within an aquifer, streamflow rates within a hydraulically connected stream, and flow rates into or out of aquifer storage. This report documents the new State Variables Package for the Groundwater-Management Process of MODFLOW-2005 (GWM-2005). The new package provides a means to explicitly represent heads, streamflows, and changes in aquifer storage as state variables in a GWM-2005 simulation. The availability of these state variables makes it possible to include system state in the objective function and enhances existing capabilities for constructing constraint sets for a groundwater-management formulation. The new package can be used to address groundwater-management problems such as the determination of withdrawal strategies that meet water-supply demands while simultaneously maximizing heads or streamflows, or minimizing changes in aquifer storage. Four sample problems are provided to demonstrate use of the new package for typical groundwater-management applications.
Suggested Citation
Ahlfeld, D.P., Barlow, P.M., Baker, K.M., 2011, Documentation for the State Variables Package for the Groundwater-Management Process of MODFLOW-2005 (GWM-2005): U.S. Geological Survey Techniques and Methods 6-A36, vii, 45 p., https://doi.org/10.3133/tm6A36.
ISSN: 2328-7055 (online)
ISSN: 2328-7047 (print)
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Documentation for the State Variables Package for the Groundwater-Management Process of MODFLOW-2005 (GWM-2005) |
| Series title | Techniques and Methods |
| Series number | 6-A36 |
| DOI | 10.3133/tm6A36 |
| Year Published | 2011 |
| Language | ENGLISH |
| Publisher | U.S. Geological Survey |
| Contributing office(s) | Office of Groundwater |
| Description | vii, 45 p. |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |